Horror is a film genre seeking to elicit a negative emotional reaction from viewers by playing on the audience's primal fears. Inspired by literature from authors like Edgar Allan Poe, Bram Stoker, Mary Shelley, horror films have for more than a century featured scenes that startle the viewer. The macabre and the supernatural are frequent themes. Thus they may overlap with the fantasy, supernatural, and thriller genres.A practical joke is a mischievous trick played on someone, generally causing the victim to experience embarrassment, perplexity, confusion or discomfort. A person who performs a practical joke is called a "practical joker". Other terms for practical jokes include prank, gag, jape, or shenanigan.